Automatic synchronizing mechanism.



W, J. HERSCHEDE & C. COHAN. AUTOMATIC SYNCHRONIZING MECHANISM.

APPLICATION FILED DEC. [4, 1916- Patented Dec. 18, 1917.

2 SHEETS-SHEET l.

- W. J. HERSCHEDE & C. COHAN.

AUTOMATIC SYNCHRONIZiNG MECHANISM.

APPLICATION FILED 050.14. 1916.

1,250,173. Patented Dec. 18,1917.

' I], 2 SHEETS-SHEET 2.

41M QUARTER QuA RTER QUARTER H0 UR UNITED STATES PATENT OFFICE.

WALTER J. HERSCHEDE AND CHARLES COHAN, OF CINCINNATI, OHIO, ASSIGNORS TOTHE HERSCI-IEDE HALL CLOCK COMPANY, OF CINCINNATI, 01-110, A CORPORATIONOF OHIO.

AUTOMATIC SYNCI-IRONIZING MECHANISM.

Specification of LetteTsPatent. Patented Dec 18, 1917 Application filedDecember 14, 1916. Serial No. 136,833.

To all whom it may concern:

Be it known that we, WVALTER J. HER- SCHEDE and CHARLES Conan, citizensof the United States of America, and residents of Cincinnati, in thecounty of Hamilton and State of Ohio, have invented a new and usefulImprovement in Automatic Synchronizing Mechanism, of which thefollovvlng is a specification.

This invention relates to and has for an object to produce a mechanismfor automatically synchronizing the chime striking and time indicatingmechanisms of clocks of the series revolution chime drum type, that is,clocks having chime drums which rotate more than once during each hourto complete the striking of the chime.

A further object is to produce a mechanism adapted automatically tocorrect the striking of the chime in a clock of the series revolutionchime drum type, so that should the chime be inadvertently thrown out ofadjustment in that it fails to strike the proper chime at the respectivequarters of the hour, at the succeeding hour the chime strikingmechanism will be adjusted correctly to strike the proper chime at theproper quarter.

A further object is to produce a clock having automatic synchronizingmechanism adapted to permit independent adjustment of the hour andminute hands without throwing the time indicating and chime ringingmechanisms out of synchronism.

These and other objects are attained in the mechanism described in thefollowing specification and illustrated in the accompanying drawings, inwhich:

Figure 1 is a front elevation of a clock movement embodying ourinvention.

Fig. 2 is a fragmental transverse sectional end elevation taken on thebroken line 22 of Fig. 1.

Fig. 3 is an end elevation of the chime drum, taken on the line33 ofFig. 1, some portions being shown in, section and some fragmentally.

Fig. 4 is an end elevation of the track which controls certain oftllCInOVGlTlBIlCS of the chime drum, the view being taken on line 4& ofFig. 1. v

5 is a sectional view of the track and e nts pee rati g e ewith. the eal of I the chime-drum being shown fragmentally and in cooperativerelation with the track.

Fig. 6 is a view of the releasing and stopping mechanism of the chimedrum operating train, the mechanism being shown in the position itassumes upon release of the drum rotating train.

Fig. 7 is a more-or less diagrammatic view illustrating the positionsassumed by the stopping and releasing mechanism disclosed in F 6, whenthe chime train is brougl'it to a stop.

Fig. 8 is a view similar to Fig. 7, but showing the stopping andreleasing mechanism in the position it assumes in the motion of itselements to their train releasing positions.

Fig. 9 is a view similar to Figs. 7 and 8, showing the same position ofthe stopping and releasing mechanism as disclosed in Fig. 6, thedisclosure in Fig. 9 however, being diagrammatic. 4

Fig. 10 is a sectional View: of the track, taken on the line 101O ofFig. I.

Fig. 11 is arepresentation of the notes of the music of the chime struckby the mechanism illustrated as an embodiment of our invention. 1

The clock embodying our invention con sists of the usual chime train andtime train and the mechanism for releasing and stopping the chime trainis of a construction like that heretofore employed. In general theoperation of the entire mechanism closely resembles the mechanismdisclosed in United States Letters Patent 909,298, issued to Edward F.I-Ierschede upon January 12, 1909. However, in the construction hereindisclosed'the invention consists of a mechanism adapted to synchronizethe movement of the twoqrevolution chime striking mechanism with thetime train with which it cooperates, instead of a single'revolutionchime drum and operating mechanism thereof, as disclosed inthe abovementioned patent.

In the embodiment ofour invention we have. disclosed a clock movementhaving chime mechanism adapted to strike the WVestminster chime. Themusic of i this chime, as in some other chimes employed in chime clockconstruction, is written particularly for two revolution chime drummechanisms, the first five measures of the chime music, as disclosed inFig. '11, being a dupli;

cate of the last five measures. This permits of the playing of thecomplete chime byrotating the chime drum twice during the hour, thevarious quarters being set forth in brackets in Fig. 11. It will-be seenthat the third quarter of the chime includes the last two measures ofthe first half of the complete chime as well as the first measure of thesecond half. Such an arrangement necessitates the playing of the firstmeasure of the chime for the first quart-er. of thehonr, the second andthird measures for the second quarterorhalf hour, the fourth, fifth andsixth measures for the third-quarter, and the last four measures for thefourth quarter at which time the hour is completedand the chime placedin conditionto strike the hour as indicated at the end of thechimemusic. The striking of the correct measuresat the designated quarters ofthehour, however, is frequently disarranged by tampering with the chimestriking mechanism orby allowing the chime striking mechanism .torundown independently of the time train so that upon rewinding thestriking mechanism the chime is thrown out of its proper arrangement.The readjustment of the striking mechanism to correctly correspond with;the quarters, necessitates a certain amount of knowledge of themechanism of the clock movementas well as a knowledge of the music ofthe chime. The average purchaser of a chime clock is not fullyacquainted with either its mechanism or the music which it is adapted toplay.

Furthermore,the time indicating mechanisms of clock movements ordinarilyused and having chime ringing mechanisms, when run down, necessitatesetting the hands by moving the minute and hour hands in the usualmanner by grasping the minute hand and moving it around the clock dialuntil the hour hand is brought to indicate the proper hour. Such a meansof adjust ment of the time indicating mechanism necessitates aconsiderable time in which to correctly set the clock. Furthermore, thechiming mechanism, in order that it be not thrown out of synchronizationwith the time indicating mechanism, necessitates stopping the hands ateach quarter of the hour in order to allow the chime mechanism to playits proper quarter or the time indicating mechanism can :be set and thechime ringing mechanism afterward brought into synchronization with thetime indicating mechanism through a tedious process necessitatingknowledge of the chime anusicand the mechanism for playing it. Such aprocedure is inconvenient in that it necessitates care and time to makethe proper adjustment. For this reason the automatic synchronizingmechanism now to be described has been devised.

In this mechanism the usual minute shaft 12 .upon the squared end ofwhich the minutehand 12 of the clock is placed, carries the usual sleeve13 extending from the usual reduction gear 14 upon which the hour hand13 is mounted.

Reduction gear 14 which is secured to sleeve 13, meshes directly with agear 59, the purpose of which will be hereinafter described. iThe rearportion of sleeve 13 is provided with a shoulder 13 upon which agear 14which is similar to gear14, is rotatively mounted. To the rear ofshoulder 13 is an annular groove 13 in which is mounted aspring 14 whichbears against an annular shoulder 13 formed on the-sleeve 13. By meansof spring 14", gear 14 is maintained in frictional engagement withflange 13 to whichgear 14 is-secured. Gear 14 meshes with a pinion 17which extends ffroma gear'16 rotatively mountedon a stud extending fromthe front plate of the clock. Gear 16 in 'turn meshes with gear 15secured to the minute shaft 12 of the 'timeinindicating mechanism. Gears15, 16, 17- and 14 'beara twelve to one ratio with relation to oneanother so that gear 15 rotatestwelve times to onerotation of the gear14?. Gear 14 being frictionally connected with gear 14, consequently isrotated at the-samearate. Upona stud 18 extending from the front plateof the movement, are=pivotally mounted releasing and tripping levers 19.and 20 respectively, lever 19 being provided with a finger2l whichextends through a slot 22 formed in the front plate of the movement, andlever 20 also being provided with a finger 23 which extends through theslot 22. Both fingers 21 and 23 are adapted to be moved into and out ofengagement with the usual ser'es of pins 24'of the chime releasing wheel'25 of the chime train. In its normal position, lever 19 is adapted tohave its finger 21 in position to afford an abutment'for any one of thepins 24, and when raised as disclosed in Figs. 1, 6, 8 and 9, topermit-of the passage of the pin bearing against it. Finger 23 of lever20 is normally in its lower position as disclosed in Figs. 1, 6, 7 and9, but in its raised position is adapted to intercept the pins 24 and toarrest the movement of wheel 25 by being brought into 'thepath of thesepins. In order to raise lever 20 to the position disclosed in Fig. 8,its end 26 is provided with a pawl 27 which, in the lowered position ofthe lever, lies in the path of a series of pins 28 and 29 extending fromthe front face of gear 15 forming one of the set of reduction gearsabove described. Upon rotation of gear 15, the pins will be broughtsuccessively into engagement with the edge of pawl '27 and lever 20 willbe raised. The pins 28 are located at a greater distance from the centerof shaft 12 than is the pin 29. Therefore, lever 20 will. be lifted to a40 mounted on the reduction gear 16.

greater extent by pins 28 than by pin 29.

" The reason for this will i be hereinafter more fully'described.Beneath levers'19 and is located a-stud 30 upon which a awl 31 ispivoted, theend of the'pawl being provided with two notches 32 and 33.Either of these notches isadapted to 'beengaged by a pin 34 located onlever 19,when the pawl has been brought toits elevated position asdisand the pawl is elevated to the point where pin 34 of lever l9'entersnotch 32. The

result is that lever 19, Whether its pin 34 occupies notch 32'ornotch'33, is held in such an elevated position that its finger 21 iscaused to release the pins 24. Immediately after'the passage of eitherthe pins 28or29, beyond the pawl 27, the lever 20 is dropped, the finger23 being moved by such a move ment, away fronithe pins 24, therebyreleasing the chime train,'pawl 31 being held in its elevated positionwith relation to lever 19 by'reason of the friction of pin 34 in eitherof the notches 32 or 33. Lever 19 is moved'from its raised position-byengagement of a finger 36 formed on an upwardly projecting arm 37 of thelever, with suitable releasing mechanism hereinafter to be more fullydescribed.

As a portion of the 'synchronizing'mechanism embodying our invention, wehave provided a stud 38 uponwhich a lever '39 is pivotally mounted, thelowerend of the lever being adapted to be engaged'by a pin This lever 39is retained yieldingly in position to be engaged by pin 40, by means ofa spring 41 secured to thefront plate of'the movement asshownin Fig. 1.of lever39 is provided with an inwardly extending finger 42 located inalinement with the adjacent end of shaft 43-of the chime drum. Sincegear 15 rotates once during each hour, gear=16 which bears a one to oneratio with gear 15, also rotates once every hour. For this reason pinwhich engages the end of lever 39, causes operation of lever 39 onceeveryhour. The function performed by the operation of lever 39 at such atime, will be hereinafter more fully described. I

The chime .drum 44 is of the usual construction in that it is providedwith a series of pins 45..adapted to cause'operation of the t5 hammeroperetingilevers 46, these The upper end l'e'vers "in turn beingpivotally mounted" "in the usual manner 'on" a. bar47 extendinglongitudinally of the -movement and located above it onbrackets" 48positioned at each end of the movement,'the brackets being'secured -tothe front and back plates thereof in any suitable manner; The drum -44-'is rig-idly mountedon its shaft 43 which is adapted to slide inbearingsformed in the brackets 48, 'the'end of the drum adjacent to thechime train, being provided with' 'a wide face gear 49 whichIne'slieswith the usual crown gear 50 extending from the chime train andpermits of the drums reciprocation without disengagement of gear '49from gear 50.

At the end of shaft 43 which bears". gear 49, a spring 51 is provided,this spring being secured to the plates of the movement in any suitablemanner, the. tendency of the spring being to force the drum toward theopposite end of the movement'and 'to bring the opposite end of itsshaft'43 into 1 engagemenflwith finger 42 of lever 39.

Itis the mechanism provided at the left hand'end of the drum, whichconstitutes the principal feature of novelty of our invention. Thismechanism consists of"se'veral elements, chief among which isa' member52 w'hich-will be'design'ated the first track. This member is hollowandjis provided in its interior with a gear 53 which is rotativel'ymounted on drum s'haft 43. This gear 53 meshes with a pinion 54 securedto-a' shaft 55 extending obliquely between the front and back plates ofthe movement and provided at -its lowenen'd with a pinion "56 whichmeshes with a gear 57 'carried by a shaft 58 extending through the frontplate of the inovementand which is providedat it'sfront end with gear59which meshes with the reduction gear14, gear 59 and gear 14 "bearing aone to one gear ratio with relation to each other. The'sizes of'gears 53and 57'as well as pinions'54 and 56, with relation to one another, issuch that both gears 'rot'ate'on'ce every 12 hours, the same as doesgear 14. Gear 53is provided with an annular flange 60, this flangeextending beyond the periphery of the opening 61 located' in the centerof the annular track member 52. This provides 'a second track 62theus'es of which will be hereinafter described. Centrally located ofthe'tr'ack 62 is an opening forming a hollow 63 in the gear 53, thebottom 67 of the hollow forn ingthe third track, the functionof whichwillbe hereinafter described. The annular track formed on the end faceof member 52 is provided with a spirally formed groove 64, this groovebeing semi-circular in cross section and extending spirally twice"around the track, the inner end terminating in the opening- 61 formedcentrally of thegine'mb er 52. The sentinel track 62 formed on the endface of the flange 60 is left plain, a notch 65 being provided however,in this track, this notch having one wall 66 inclined as disclosed inFigs. 4 and 10, the opposite wall also being inclined but in a planeextending toward the hollow 63 of the gear 53. The bottom of the notchis in the same plane as the bottom 67 of the hollow 63. On that end ofthe drum located adjacent to the groove or track 64, an arm 68 ispivotally mounted on a pin 69 secured to the end of the drum, themovable end of the arm having a pin 70 extending toward the track 64 andadapted to occupy it. This arm 68 is adapted normally to be pressedoutwardly by a spring 71, so that its curved outer edge many engage thecurved inner surface of the recessed end of the drum. This pin 70 isnormally in engagement with the outer convolution 72 of the track 64during the first half of the hour, or during that portion of the hour inwhich the first and second quarters of the chime are struck, in additionto a portion of the time during which the third quarter of the chime isstruck, the

outer convolution being operative during the first half of the completechime located to the left of the line AA of Fig. 11. The last measure ofthe chime struck at the third quarter of the hour, is played during andafter the passage of the pin 70 from the outer to the inner convolution73 of the track. At the completion of the third quarter, pin 70 is inthe position disclosed in the drawings, viz., in the second or innerconvolution of the track. When the last quarter is to be chimed and thehour is to be struck, pin 70 travels from the last men tioned position,to the position in which the inner end of track 64 disengages ittherefrom and directs it into the opening 61 and onto the second track62. This permits the drum to move to the left under the influence ofspring 51, thus removing pins from chime hammer operating levers 46 andplac ing a series of hour striking pins 74 into position to engage thehour hammer operating lever 46, which operates the hammer adapted tostrike the hour. Rotation of the drum is continued until the pin 70,traveling on second track 62, reaches notch 65, at which time theinclined surface 66 permits the pin to drop to a level with the thirdtrack or bottom 67 of the hollow 63, thereby disengaging it from track62, the drum shifting again to the left under the influence of spring'51and rotation thereof continued until pin 70 has been moved from thenotch into the hollow 63. At this time the rotation of the drum isstopped.

WVe will now describe the mechanism for stopping the rotation of thedrum. Located on the drum in position to engage finger 36 of stop lever19, are two pins 75 and 76, pin 75 being adapted to stop the rotation ofthe chime drum by tripping lever 19 and dropping it so as to have itsfinger 21 engage one of the pins 24, at the time of completion ofthefirst quarter hour chime. Pin 76 is so positioned on the drum as tostop it in the same manner upon completion of the second quarter or halfhour chime. Upon completion of the third quarter the pin 75 again isbrought into operation to drop lever 19 and to stop the chime drum.However, when the fourth quarter is reached, pin 29 which has operatedlever 20 and pawl 31 to lift lever 19 to the position wherein its pin 34is brought to occupy notch 32 of pawl 31, has

' caused finger 36 of lever 19 to be moved to such a position as to justmiss pins 75 and 76 in their passage during rotation of the drum. Thisposition of lever 19 is sufficient however, to permit of the passage ofpins 24 of the chime train and to thereby permit of operation of thechime mechanism when finger 23 of lever 20 is removed from the path ofpins 24. This permits the chime drum to rotate without hindrance duringthe four measures comprising the fourth quarter chime strike, thusavoiding pin 76 which would normally stop the chime mechanism were lever19 raised to the position in which its pin 34 occupies notch 33.However, upon completion of the chime strike, pin has reached the end oftrack 64 and aasses on to second track 62. This causes further shiftingof drum 44 and brings pins 74' into engagement with the hammer operatinglever 46. As soon as sufficient pins 74 have passed the end of lever 46to strike the proper hour, notch 65 of gear 53 is encountered by pin 70and the drum is shifted toward track member 52 by spring 51 to bring thepins 74 out of alinement with hour hammer operating lever 46. At thistime a lug 77 secured to the surface of the drum, is brought intoengagement. with finger 36, the finger is dropped and the chimemechanism'stopped. The position of notch 65 with relation to the innerend of inner convolution 73 of track 64, is governed entirely by thetime indicating mechanism of the clock, thus determining the amount ofsecond track 62 over which pin 70 passes and consequently regulating thenumber of pins 74 which are brought into engagement with the lower endof lever 46', before drum 44 is shifted to bring these pins out ofalinement with the lever. In the drawings the notch 65 as well as allother portions of the clock mechanism, are shown in positions in whichthe chime mechanism has been re leased to chime and strike 12 oclock.

The various elements of the mechanism belng shown in positions in whichthe chime mechanism is released and ready to start the striking of thechime and hour of 12, the operation which have previously taken place tobring the parts to these positions,

will be described, before proceeding with the description of theoperation of the mechanism. It will be assumed that the clock train isapproaching 12 oclock. At this point the pin 29 will engage paWl 27 andcause lever 20 to rise, bringing its pin 35 into engagement with pawl 31and causing pawl 31 to lift lever 19 and pin 34'carried by it untilnotch 32 is encountered, pin 34 dropping into this notch. Simultaneouslywith the lifting of lever 20, its finger 23 is brought into the path ofthe pins 24, and as lever 19 is raised, its finger 21 is carried out ofthe path of pins 24. \Vith the parts in this position, pin 29 havinglifted the pawl to bring pin 34 into engagement with notch 32, becauseof pin 29 being located at a less dis tance from the axis of shaft 12than any of the pins 28, passes pawl 27 and permits it and its lever 20to drop from the path of pins 24, thus leaving pawl 31 lifted because ofits frictional engagement with pin 34 in notch 32. The parts are now inthe positions disclosed in Fig. 1 in which the chime train is releasedand starting the operation of the chiming mechanism. In this position itwill be seen upon reference to Fig. 1, that finger 36 of lever 19 is outof alinement with pins 7 5 and 7 6. Also it will be seen that gear 53 isin such a position with relation to track member 52 that marks 78 ofboth the track member and the ear, register with each other. In thisposition notch 65 of second track 62 lies immediately back of the innerend of inner convolution 73 of track 64 so that pin will drop on totrack 62 instead of into notch 65. It will also be seen that pin 70occupies the position disclosed in Fig. 4, that is, in the innerconvolution 73 of track 64. The chime drum now starting to rotate causesthe fourth quarter to be chimed, this quarter being as in the music ofthe chime disclosed in Fig. 11. Neither of the pins 7 5 or 76 willengage finger 36 because of its position as above described. Thispermits of completion of rotation of the chime drum to chime thecomplete four measures of the fourth quarter, and brings pin 7 0 to theinner end of track 64 precisely upon completion of the last note of thechime. The chime drum continues to rotate, but the passage of pin 70into the opening 61 of track member 52, and on to second track 62, asdisclosed at 7 9 in Fig. 4, causes drum 44 to be shifted to bring pins45 out of alinement with chime hammer levers 46 and to bring pins 74into alinement with hour hammer lever 46, the drum shifting under theinfluence of spring 51. Without stopping its rotation, the drumcontinues, pins 7 4 being brought successively into contact with lever46 and thus causing operation of the hour striking hammer conectedtherewith, to strike the correct hour, the pin 70 traveling around thesecond track 62 during such striking operation, so that each of the 12pins 74 which are located on the drum, is brought into contact withlever 46 to cause it to strike 12 oclock. At the completion of thetwelfth stroke the pin is brought to the position indicated at 80 inFig. 4, in which it is on the edge of incline 66 which permits drum 44again to shift to bring pins 74, to the left of and out of alinementwith hammer lever 46. The drum continues to rotate until pin '70 hasbeen broughttothe successive positionsshown at 81, S2 and 83 in Fig. 4,at which time lug 7 7 engages finger 36 and lifts lever 19, therebycausing pawl 31 to drop so that lever 19, when released by lug 77 willbe permitted to drop and bring its finger 21 into the pathof pins 24 andthereby arrest the movement of the chime striking mechanism.

During the next quarter hour the pin 40 on gear 16, is brought intoengagement with the lower end of lever 39 and this lever which now hasthe end of shaft 43 bearing against its finger 42, is caused to move andto shift the chime drum to the right until it is in such a position thatthe pin 70 is freed from track member 52 so that spring 71 carries it toa position opposite the outer end of outer convolution 72 of spiraltrack 64, into which it is carried when lever 39 releases shaft 43, inwhich position it is ready to chime the first quarter of the next hour.The lower end of lever 39, before the first quarter of the next hour isreached. is released and permitted to drop to its normal position asdisclosed in Fig. 1, pin 40 then occupying a position on the oppositeside of the lever from that shown in Fig. 1. During the time-that thedrum is being shifted to its normal position by lever 39, levers 19 and20 are again being raised to their ele vated positions, this time beingraised by one of the pins 28 instead of by pin 29. Under the influenceof pins 28, lever 19 is raised until its pin 34 engages notch 33 of-pawl31 instead of engaging notch 32. This raises lever 1.9 higher and bringits finger 36 into the path of pin 75. As soon as lever 20 is releasedupon the clocks reaching the first quarter, the drum will berotateduntil pin 75 engages finger 36 and causes lever 19 to be raised and tobe dropped to bring its finger 21 into the path of pins 24 so as toagain stop the chime. The same operation would occur at the secondquarter or half hour at which time pin 7 6 instead of pin 75 would causethe stoppage of the chime mechanism. Substantially the same operationsare performed previous to, during and after the striking of the thirdquarter of the hour, pin 75 however, being brought again into operationto release thelever 19 and to stop the chime train. This brings the pin70 to the position disclosed in Fig. 4, at which the, previousldescribed operation of striking the fourth quarter of the hour iscarried out.

However, in the. hour succeeding the hour of 12, different conditionsexist as to the pos1- tion of notch 6.5 with relation to the inner endof spiral track 64. This is because gear 58 has been rotated through itsconnections 54: to 59, inclusive, through one twelfth of arevolution soas to bring notch sufficiently beyond the inner end of spiral track 64to permit of the operation of but one pin 74 in engagement with hourhammer lever 46.. Immediately upon causing one pin 74 to cause onestroke of the hour striking ham.- mer, pin is dropped into notch 65 andthe drum is shifted to bring pins 74 out of alinement with hammeroperating lever. 46. The drum continues to rotate with pin 7 0 withinthe hollow portion 63 of gear 58, so that after having struck one.oclock the remain.- ing eleven of: the pins 74, will miss theham- Iner.operating lever 46 and the drum will rotate the remaining eleventwelfths o-fa revolution, without any of it pins engaging any of the.levers d6 and 46 at which time the. lug 77 will be brought intoengagement with finger 36 to cause stoppage. movement of the leverv 19.It is this idle rotation of thechime drum, which automatically sets orsynchronizes. the chime mechanism, with the time indicating mechanism,the drum,

whether it is chiming correctly or not, caus.

ing, the hammer lever operating pins to. be correctly placed foroperation on the first quarter of? each succeeding hour. No matterwhether the hour striking pins have, operated the hour striking hammerto strike one oclock, or any other hour, they chime drum is. alwaysbrought to a stop at the same place. after each hour has been struck,the lug 77 on the chime drum, causing stoppage of the drum at the sameplace. after each hour striking movement thereof. In this manner theoperation of the chiming mechanism, no matter. how badly disarranged.it. may be. to' strike the quarters, will always be. automatically setcorrectly to strike. the, first quarter of the. succeeding hour.

In the above description it will be, seen that thepin, 70. in itsmovement around the track portions, first occupies the portion 64, thenthe second track portion 62 and finally the. third, track portion 67-.Thus, in its.

IL Yement it takes substantially a spiral course, the first portion ofits spiral movement being. when it moved from, the outer convolution tothe inner convolution of the groove 64; and, the next portion of itsspiral movement being when it moved from the inner. portion of groove,64 to. the second track portion 62-, the final portion of the spiralmovement being when it moves. from track portion 62 to third; trackportion 67; Therefore, in our improved construction we have embodied a,spiral track member in the various portions of which. differentfunc.

tions of the chime drum are performed. In addition to the spiralmovement of the pin in a plane extending transversely of the track, itis alsov given conical spiral movement, the various portions 64, 62 and6,7 of the track, being located in different planes and the pindescribing what is substantially a conicalspiral. in its movement fromone plane to the next plane. Our invention permits of the employment ofa chime drum having pins spaced for utilization of chime musicespecially written for two revolution drum mechanisms, the advantagesattained by this. two revolution drum construction being manifest inthat, simplicity of construction is attained, reduction in size. ofchime drum and gears for operating it; is attained, and; cost ofmaterials and manufacturing operations is reduced.

In addition to the production of a synchronizing mechanism for a two.revolution chime drum clock construction, we have-provided aconstruction embodying elements which permit separate adjustment of thend minute hands and which will not destroy the synchronism of thechiming mechanism and the time indicating mechanism whether the minutehand. or the hour.

hand is moved to adjust it to. its correct position. This mechanism isembodied in the frictional construction containing the. gears I l and;14 and spring 14*. In this mechanism, adjusting movement of the hour.hand. 13,, separate and distinct from the minute hand 12 is afforded byreason of the. frictional connection between gears 14% and let. Gear 14is the. driven gear of the hour hand and through its frictionalengagement with flange. 189. of sleeve. 13, it drives gearv 14: which.is rigidly. connectedwithflange 13?. In order to adjust the hour hand itis merely necessary to grasp the hand and rotate, itv with its collarvl8 until it points to the proper hour. This movement causes rotation ofgears 14 and 59 and; through shaft'58 causes gears 57 and 5,6: to

rotate. shaft 55, this shaft in turn rotating Gear 53 is the one.

pinion 54: and gear 53. bearingtracks 62 and 67. This brings notch 65 oftrack 62 into the proper. position with relation to contact pin 70 sothat the. drum will. be shifted at the proper time to disengage pins 74from lever 46 of the hour.

striking hammer. Thus it will be seen that at any positionv to whichhour hand 13. is moved, gear 53 will be rotated to bring notch 65 intoproper position so that the.

correct hour. will be struck without having to make. any otheradjustment of the strikin g mechanism.

In addition to the above novel: features of our invention. we haveadapted the releasing. and tripping levers 19. and 20- respectively,togetherv with the pawl 31, to. operate successfully for. chime ringing.mechanisms having chime drums which rotate twice during each hour tocomplete the ringing of the chime. This distinction over the patent toEdward F. Herschede, above referred to, lies particularly in theprovision of the two notches 32 and 33 on the pawl 31 and in thelocation of the pin 29 with relation to the pins 28 on the gear 15. Wereit not for these distinguishing features of novelty the generalconstruction disclosed in the above mentioned patent could not beemployed in a series revolution chime'drum mechanism.

Having thus described our invention, what we claim is:

l. A clock comprising time indicating, chime ringing, and synchronizingmechanisms, said chime mechanism consisting of a chime drum and meansfor rotating the chime drum a number of complet rotations during eachhour, and said synchronizing mechanism consisting of a track located atone end of the drum and consisting of a series of convolutions, and acontact device mounted on the drum, adapted to engage the track duringchime ringing rotation of the drum and to be disengaged therefrom uponcompletion of chim ringing rotation of the drum.

2. A clock comprising time indicating, chime ringing, and synchronizingmechanisms, said chime mechanism'consisting of a chime drum and meansfor rotating the chime drum a number of complete rotations during eachhour, and said, synchronizing mechanism consisting of a track located atone end of the drum and consisting of a series of convolutions, acontact device mounted on the drum, adapted to engage the track duringchime ringing rotation of the drum and to be disengaged therefrom uponcompletion of chime ringing rotation of the drum, means for shifting thedrum to stop the ringing of the chime, upon disengagement of the contactdevice from the track, and a drum resetting mechanism adapted to beoperated by the time indicating mechanism to reset the drum to itsnormal chime ringing position upon the completion of each hour.

3. In a clock the combination of time indicating, chime ringing andsynchronizing mechanisms, said chim ringing mechanism consisting of aseries of devices for sounding the hours and fractions thereof, a chimedrum, pins on the chime drum adapted to actuate the sounding deviceswhen the drum is rotated, and means for rotating the drum a number ofcomplete rotations during each hour, and said synchronizing mechanismcomprising a track consisting of convolutions located at one end of thedrum, a contact device mounted on the drum, adapted to engage the trackduring rotation of the drum with the pins in operative relation with thesounding devices, and to be dis engaged therefrom after completion of operative relation of the pins with the sounding devices, and means forshifting the drum to stop the ringing of the chime, upon disengagementof the contact device from the track, to move the pins from operativerelation with the sounding device.

4. In a clock the combination of time indicating, chime ringing, andsynchronizing mechanisms, said chime ringing mechanism consisting of aseries of devices for sounding the hours and fractions thereof, a chimedrum, pins on the drum adapted to actuate the sounding devices when thedrum is rotated, and means for rotating the drum a number of completerotations during each hour, and said synchronizing mechanism comprisinga track consisting of convolutions located at one nd of the drum, acontact device mounted on the drum, adapted to engage the track duringrotation of the drum with the pins in operative relation with thesounding devices, and to be disengaged therefrom after completion ofoperative relation of the pins with the sounding devices, means forshifting the drum to stop the ringing of the chime, upon disengagementof the contact device from the track, to move the pins from operativerelation with the sounding devices, and a drum resetting mechanismadapted to be operated by the time indicating mechanism to reset thedrum to its normal position with the pins in operative relation with thesounding devices, said resetting mechanism being operative upon thecompletion of each hour.

5. In combination in a clock, a time indieating, a chime ringing, and asynchronizing mechanism, said chim mechanism consisting of devices forsounding the hours and fractions thereof, pins on said drum adapted toactuate the devices for sounding thefractions of the hour, second set ofpins on said drum, adapted to actuate the devices for sounding the hour,said pins being brought into operation a series of times in sounding themultiple quarters, and means for rotating the chime drum the propernumber of complete rotations during each hour to complete the soundingof the chime, said second set of pins normally being out of operativerelation with the hour sounding devices when the first set of pins is innormal operative relation with the fractional hour sounding devices, andvice versa, and said synchronizing mechanism consisting of a trackhaving a primary and secondary portion located in different planes, acontact finger mounted on the drum, adapted to engage the primaryportion of the track during fractional hour sounding rotation of thechime drum, and to occupy the secondary portion of the track uponcompletion of the fractional hour sounding rotation of the nisms, saidchime mechanism consisting of devices for sounding the hours andfractions thereof, pins on said drum adaptedto actuate the devices forsounding the fractions ofthe hour, a second set of pins on said drum,adapted to actuate the v devices for sounding the hour, said pins beingarranged to necessitate more than one complete rota: tion of the drum tocomplete the sounding of the chime Within each hour, stops spaced apartfor controlling the motion of the drum for each fractional hour movementthereof, and a second stop spaced from the first mentioned stopslongitudinally and peripherally of the drum,adapted to stop rotation ofthe,

drum after hour sounding movement there of, and means for rotating thechime drum the proper number of times vduringv each hour to complete thesounding of the chime, said second set of pins normally being out ofoperative relation Withthe hour sounding devices when the first set ofpins is in normal operative relation with the fractional hour soundingdevices, and vice versa,

stop levers operatively associated with the tlme lndicatlng and chimeringing mechanisms, whereby the time indicating mechanism Will placesaid levers in position to be acted upon said first mentioned stops tostop the rotation of the drum during fractionalv hour rotation thereof,said synchro-.

nizing mechanism consisting of a track having first, second and thirdportions located in different planes, a contact finger mounted on thedrum, adapted to engage the first portion of the .tracleduringfractional hour sounding rotation of the chime drum, adapted tooccupythe second portion of the track during hour sounding rotation ofthe chime drum, and to occupy the third portion of the track aftercompletion of hour sounding rotation of the chime drum, means forshifting the drum upon change of position of the contact finger from thefirst to the second portion and from the second to .the third portion ofthe track, and a drum resetting mechanism adapted to be operated by thetime indicating mechanlsm to reset the drum to its normal fractionalhour sounding posi- Lea -r123 tion after completion of itsrotation-While occupying the third track portion. position.

7.v A clock comprising a time indicating mechanism, a chime ringingmechanism, a synchronizing mechanism, a means operatively connected Withthe time indicating and synchronizing mechanisms, adapted to permitindependent adjustment of the .hour and minute hands of the timeindicating mechanism without, destroying the synchros nism betw een thetime indicating mechanism and the chime ringing mechanism established bysaid synchronizing mechanism.

8. A, cloclecompi'ising, a time indicating mechanism, a chime ringingmechanism,a synchronizing mechanism, and means con nected Withthe timeindicating mechanism and the synchronizing mechanism, adapted to permitindependent adjustment of the hourand minute hands of the tim indicatingmechanism Without destroying the synchronism between the time indicatingmecha nism and the chime ringing mechanism es; tablished by saidsynchronizing mechanism, said synchronizing mechanism consistingof atrack located at one end of the drum and a contact device mounted on thedrum, adapted to engage the track during chime ringing rotation of thedrum and to be dis en aged therefrom. upon completion of chime ringingrotation of the drum.

9.,A clockcomprising a time indicating mechanism, a chime ringingmechanism, a synchronizing mechanism, a means operatively. connectedWith the time indicating and synchronizing mechanisms, adapted to permitindependent adjustment of the hour and minute hands of the timeindicating mechanism Without destroyingthe synchro nism between the timeindicating mechanism and the chime ringing mechanism es tablished bysaid synchronizing mechanism, said chime mechanism consisting of a chimedrum and means for rotating the drum a number of times during each hour,said syn chronizing.mechanism consisting of a track located at one endof the drumcand consistingot a series of convolutions, and a contactdevice mounted on the drum, adapted toengage the track during chimeringing rotation of the drum and to be disengaged therefrom uponcompletion of chime ringing rotation of the drum.

10. A clock comprising a time indicating mechanism, a chime ringingandhour striking mechanism, a synchronizing mechanism, said chime ringingand hour striklng mechanism consisting of a chime drum and means forrotating the chime drum a number .of complete rotations during eachhour, said synchronizing mechanism consistingnof a track located at, oneend of the drum and consisting of a series of C011VOl11t1OI1 S,,{L.COI1-tact device mounted on the drum, adapted to engage the track duringchime ringing rotation of the drum and to be disengaged therefrom uponcompletion of chime ringing rotation of the drum to strike the hour, atripping and releasing device adapted to trip the chime ringing and hourstriking mechanism previous to the completion of predetermined fractionsof the hour and to release the chime ringing and hour striking mechanismupon completion of said fractions, and means adapted to position saiddevice difierently previous to the completion of each hour to trip andto permit releasing of said chime ringing and hour striking mechanismupon completion of each hour, whereby the hour chime will be rung beforesaid contact device is disengaged from the track and the hour strikewill be struck after disengagement of the contact device from saidtrack.

11. A clock comprising a time indicating mechanism, a chime ringing andhour striking mechanism, a synchronizing mechanism, means connected withthe time indicating and synchronizing mechanisms adapted to permitindependent adjustment of the hour and minute hands of the timeindicating mechanism without destroying the synchronism between the timeindicating and chime ringing mechanisms established by saidsynchronizing mechanism, said chime ringing and hour striking mechanismconsisting of a chime drum and means for rotating the chime drum anumber of times during each hour, said synchronizing mechanismconsisting of a track located at one end of the drum and consisting of aseries of convolutions, a contact device mounted on the drum, adapted toengage the track during chime ringing rotation of the drum and to bedisengaged therefrom upon completion of chime ringing rotation of thedrum, a tripping and releasing device adapted to trip the chime ringingI and hour striking mechanism previous to the completion ofpredetermined fractions of the hour and to release the chime ringing andhour striking mechanism upon completion of said fractions, and meansadapted to position said device differently previous to the completionof each hour to trip and to permit releasing of said chime ringing andhour striking mechanism upon completion of the hour, whereby the hourchime will be rung before said contact device is disengaged from saidtrack and the hour strike will be struck after disengagement of thecontact device from the track and upon completion of the hour chime.

12. A clock comprising time indicating, chime ringing, and synchronizingmechanisms, said chime ringing mechanism consisting of a chime drum andmeans for rotating the chime drum a number of complete rotations duringeach hour, and an automatic means for adjusting the chime mechanismafter the completion of said hourly rotations of the chime drum.

In testimony whereof, we have hereunto subscribed our names this 12thday of December, 1916.

WALTER J. HERSCHEDE. CHARLES COHAN.

Witnesses:

WALTER F. MURRAY, W. THORNTON BOGERT.

Copies of this paten may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

